South of the city, the ancient walls were not entirely demolished. Giuseppe Poggi, designer of the plan of enlargement of Florence when it became the capital, invented the Viale dei Colli, then called "the most beautiful walk in the world".

Shaded by a double row of trees and flanked by the gardens of elegant residences that were built here, embellished with extremely pleasant gardens, it is a route that has preserved much of the charm of the origins, despite the incessant traffic of cars that goes through it every day.